Profoto
Profoto B10 Plus OCF Flash Head
$2095
Best Studio Strobes · head-to-head
Profoto B10 Plus OCF Flash Head vs Paul C. Buff Einstein E640 Flash Unit
A sourced, side-by-side comparison. Paul C. Buff Einstein E640 Flash Unit is cheaper at $529.95. Every spec and price links to its source.
Paul C. Buff
Paul C. Buff Einstein E640 Flash Unit
$529.95Cheaper
Which is better: the Profoto B10 Plus OCF Flash Head or Paul C. Buff Einstein E640 Flash Unit?
On the specs we track, they're closely matched. The Paul C. Buff Einstein E640 Flash Unit is the cheaper at $529.95.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Profoto B10 Plus OCF Flash Head | Paul C. Buff Einstein E640 Flash Unit |
|---|---|---|
| US price | $2095 | $529.95 |
| Brand | Profoto | Paul C. Buff |
| Released | — | — |
| Power output ws | 500 | 640 |
| Flash duration t01 | as fast as 1/50000 sec in Freeze mode; 1/3400 sec best case in Normal mode | 1/568 sec at full power (Constant Color mode, t0.5 1/1600 sec); as fast as ~1/2000 sec (t0.1) at half power in Action Mode |
| Recycle time s | 0.05-2.46 | 0-1.7 |
| Ttl hss support | TTL (Canon, Nikon, Sony, Fujifilm via Profoto AirTTL/Air Remote); HSS to 1/8000s | Manual only — no TTL, no camera-side HSS. Fires via CyberSync radio triggers or optical slave; Action Mode shortens flash duration for motion-freezing rather than providing sync-pulse HSS. |
| Modeling lamp (W) | 150W-equivalent LED (2500 lm max, dimmable 10-100%) | — |
| Color temperature k | 3000-6500 adjustable LED modeling light (±500K); flash tube ~5500K | 5600 |
| Power source | Built-in rechargeable lithium-ion battery (up to 200 full-power flashes, or 75 min continuous LED use) | AC only (100-240V, 3-wire grounded, auto-sensing with IEC connector); no battery option |
Sources — Profoto B10 Plus OCF Flash Head: profoto.com (verified 2026-08-09). Paul C. Buff Einstein E640 Flash Unit: s196259524.onlinehome.us (verified 2026-08-09).
What's the difference between the Profoto B10 Plus OCF Flash Head and Paul C. Buff Einstein E640 Flash Unit?
Where the two actually differ on the specs we track (6 of 7). Matching specs are omitted.
- Power output ws: Profoto B10 Plus OCF Flash Head 500 vs Paul C. Buff Einstein E640 Flash Unit 640
- Flash duration t01: Profoto B10 Plus OCF Flash Head as fast as 1/50000 sec in Freeze mode; 1/3400 sec best case in Normal mode vs Paul C. Buff Einstein E640 Flash Unit 1/568 sec at full power (Constant Color mode, t0.5 1/1600 sec); as fast as ~1/2000 sec (t0.1) at half power in Action Mode
- Recycle time s: Profoto B10 Plus OCF Flash Head 0.05-2.46 vs Paul C. Buff Einstein E640 Flash Unit 0-1.7
- Ttl hss support: Profoto B10 Plus OCF Flash Head TTL (Canon, Nikon, Sony, Fujifilm via Profoto AirTTL/Air Remote); HSS to 1/8000s vs Paul C. Buff Einstein E640 Flash Unit Manual only — no TTL, no camera-side HSS. Fires via CyberSync radio triggers or optical slave; Action Mode shortens flash duration for motion-freezing rather than providing sync-pulse HSS.
- Color temperature k: Profoto B10 Plus OCF Flash Head 3000-6500 adjustable LED modeling light (±500K); flash tube ~5500K vs Paul C. Buff Einstein E640 Flash Unit 5600
- Power source: Profoto B10 Plus OCF Flash Head Built-in rechargeable lithium-ion battery (up to 200 full-power flashes, or 75 min continuous LED use) vs Paul C. Buff Einstein E640 Flash Unit AC only (100-240V, 3-wire grounded, auto-sensing with IEC connector); no battery option